<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>角色管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 搜索与添加区域 -->
      <el-row :gutter="20">
        <el-col :span="4">
          <el-button type="primary" @click="addDialogVisible = true">添加角色</el-button>
        </el-col>
      </el-row>

      <!-- 角色列表区域 -->
      <el-table :data="dataList" border stripe>
        <el-table-column type="expand">
          <template slot-scope="scope">
            <!--1级菜单-->
            <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
              <el-col :span="5">
                <el-tag closable >{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <el-col :span="19">
                <!--2级菜单-->
                <el-row  :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                  <el-col :span="6">
                    <el-tag closable type="success">{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <!--3级菜单-->
                    <el-tag closable type="warning" v-for="(item3,i3) in item2.children" :key="item3.id" @close="removeRightById(scope.row, item3.id)">{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <el-table-column type="index" width="200px"></el-table-column>
        <el-table-column prop="roleName" label="角色名称" width="300px"></el-table-column>
        <el-table-column prop="roleDesc" label="描述" width="300px"></el-table-column>
        <el-table-column label="操作">
          <template slot-scope="scope">
            <!-- 修改按钮 -->
            <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.id)"></el-button>
            <!-- 删除按钮 -->
            <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeById(scope.row.id)"></el-button>
            <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>

    </el-card>

    <!-- 分配权限的对话框 -->
    <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
      <!-- 树形控件 -->
      <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 添加角色的对话框 -->
    <el-dialog title="添加角色" :visible.sync="addDialogVisible" width="50%" @close="addDialogClosed">
      <!-- 内容主体区域 -->
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="70px">
        <el-form-item label="id" prop="username">
          <el-input v-model="addForm.roleId"></el-input>
        </el-form-item>
        <el-form-item label="角色名称" prop="username">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="权限ids" prop="username">
          <el-input v-model="addForm.psIds"></el-input>
        </el-form-item>
        <el-form-item label="控制器-操作" prop="username">
          <el-input v-model="addForm.psCa"></el-input>
        </el-form-item>
        <el-form-item label="描述" prop="username">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="add">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 修改角色的对话框 -->
    <el-dialog title="修改角色" :visible.sync="editDialogVisible" width="50%" @close="editDialogClosed">
      <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="70px">
        <el-form-item label="id" prop="username">
          <el-input v-model="addForm.roleId"></el-input>
        </el-form-item>
        <el-form-item label="角色名称" prop="username">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="权限ids" prop="username">
          <el-input v-model="addForm.psIds"></el-input>
        </el-form-item>
        <el-form-item label="控制器-操作" prop="username">
          <el-input v-model="addForm.psCa"></el-input>
        </el-form-item>
        <el-form-item label="描述" prop="username">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
          <el-button @click="editDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="edit">确 定</el-button>
      </span>
    </el-dialog>

  </div>
</template>

<script>
  export default {
    data(){
      return {
        dataList: [],
        // 控制添加对话框的显示与隐藏
        addDialogVisible: false,
        // 添加的表单数据
        addForm: {
          roleId: '',
          roleName: '',
          psIds: '',
          psCa: '',
          roleDesc: '',
        },
        // 添加表单的验证规则对象
        addFormRules: {
          roleId: [
            { required: true, message: '请输入id', trigger: 'blur' }
          ],
          roleName: [
            { required: true, message: '请输入角色名称', trigger: 'blur' }
          ],
          psIds: [
            { required: true, message: '请输入权限ids', trigger: 'blur' }
          ],
          psCa: [
            { required: true, message: '请输入控制器-操作', trigger: 'blur' }
          ],
          roleDesc: [
            { required: true, message: '请输入描述', trigger: 'blur' }
          ],
        },
        // 控制修改对话框的显示与隐藏
        editDialogVisible: false,
        // 查询到的信息对象
        editForm: {},
        // 修改表单的验证规则对象
        editFormRules: {
          roleId: [
            { required: true, message: '请输入id', trigger: 'blur' }
          ],
          roleName: [
            { required: true, message: '请输入角色名称', trigger: 'blur' }
          ],
          psIds: [
            { required: true, message: '请输入权限ids', trigger: 'blur' }
          ],
          psCa: [
            { required: true, message: '请输入控制器-操作', trigger: 'blur' }
          ],
          roleDesc: [
            { required: true, message: '请输入描述', trigger: 'blur' }
          ],
        },
        // 控制分配权限对话框的显示与隐藏
        setRightDialogVisible: false,
        // 所有权限的数据
        rightslist: [],
        // 树形控件的属性绑定对象
        treeProps: {
          label: 'authName',
          children: 'children'
        },
        // 默认选中的节点Id值数组
        defKeys: [],
        // 当前即将分配权限的角色id
        roleId: ''
      }
    },
    created(){
      this.getDataList()
    },
    methods: {
      async getDataList(){
        const { data: res } = await this.$http.get('roles')
        if (res.meta.status !== 200){
          return this.$message.error('获取角色列表失败！')
        }
        this.dataList = res.data
        console.log(res)
      },
      // 监听添加对话框的关闭事件
      addDialogClosed(){
        this.$refs.addFormRef.resetFields()
      },
      // 点击按钮，添加
      async add(){
        this.$refs.addFormRef.validate(async valid => {
          if (!valid) return
          const { data: res } = await this.$http.post('roles', this.addForm)

          if (res.meta.status !== 200){
            this.$message.error('添加角色失败！')
          }

          this.$message.success('添加角色成功！')
          // 隐藏添加的对话框
          this.addDialogVisible = false
          // 重新获取列表数据
          this.getDataList()
        })
      },
      // 展示编辑的对话框
      async showEditDialog(id){
        const { data: res } = await this.$http.get('roles/' + id)

        if (res.meta.status !== 200){
          return this.$message.error('查询角色信息失败！')
        }

        this.editForm = res.data
        this.editDialogVisible = true
      },
      // 监听修改对话框的关闭事件
      editDialogClosed(){
        this.$refs.editFormRef.resetFields()
      },
      // 修改信息并提交
      edit(){
        this.$refs.editFormRef.validate(async valid => {
          if (!valid) return
          const { data: res } = await this.$http.put(
            'roles/' + this.editForm.id,
            {
              email: this.editForm.email,
              mobile: this.editForm.mobile
            }
          )

          if (res.meta.status !== 200){
            return this.$message.error('更新失败！')
          }

          // 关闭对话框
          this.editDialogVisible = false
          // 刷新数据列表
          this.getDataList()
          // 提示修改成功
          this.$message.success('更新成功！')
        })
      },
      // 根据Id删除
      async removeById(id){
        // 弹框询问是否删除数据
        const confirmResult = await this.$confirm(
          '确认要删除吗?',
          '提示',
          {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
          }
        ).catch(err => err)

        // 如果确认删除，则返回值为字符串 confirm
        // 如果取消了删除，则返回值为字符串 cancel
        // console.log(confirmResult)
        if (confirmResult !== 'confirm'){
          return this.$message.info('已取消删除')
        }

        const { data: res } = await this.$http.delete('roles/' + id)

        if (res.meta.status !== 200){
          return this.$message.error('删除失败！')
        }

        this.$message.success('删除成功！')
        this.getDataList()
      },
      // 根据Id删除对应的权限
      async removeRightById(role, rightId) {
        // 弹框提示用户是否要删除
        const confirmResult = await this.$confirm(
          '此操作将永久删除该文件, 是否继续?',
          '提示',
          {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
          }
        ).catch(err => err)

        if (confirmResult !== 'confirm') {
          return this.$message.info('取消了删除！')
        }

        const { data: res } = await this.$http.delete(
          `roles/${role.id}/rights/${rightId}`
        )

        if (res.meta.status !== 200) {
          return this.$message.error('删除权限失败！')
        }

        // this.getRolesList()
        role.children = res.data
      },
      // 展示分配权限的对话框
      async showSetRightDialog(role) {
        this.roleId = role.id
        // 获取所有权限的数据
        const { data: res } = await this.$http.get('rights/tree')

        if (res.meta.status !== 200) {
          return this.$message.error('获取权限数据失败！')
        }

        // 把获取到的权限数据保存到 data 中
        this.rightslist = res.data
        console.log(this.rightslist)

        // 递归获取三级节点的Id
        this.getLeafKeys(role, this.defKeys)

        this.setRightDialogVisible = true
      },
      // 通过递归的形式，获取角色下所有三级权限的id，并保存到 defKeys 数组中
      getLeafKeys(node, arr) {
        // 如果当前 node 节点不包含 children 属性，则是三级节点
        if (!node.children) {
          return arr.push(node.id)
        }

        node.children.forEach(item => this.getLeafKeys(item, arr))
      },
      // 监听分配权限对话框的关闭事件
      setRightDialogClosed() {
        this.defKeys = []
      },
      // 点击为角色分配权限
      async allotRights() {
        const keys = [
          ...this.$refs.treeRef.getCheckedKeys(),
          ...this.$refs.treeRef.getHalfCheckedKeys()
        ]

        const idStr = keys.join(',')

        const { data: res } = await this.$http.post(
          `roles/${this.roleId}/rights`,
          { rids: idStr }
        )

        if (res.meta.status !== 200) {
          return this.$message.error('分配权限失败！')
        }

        this.$message.success('分配权限成功！')
        this.getDataList()
        this.setRightDialogVisible = false
      }
    }
  }
</script>

<style lang="less" scoped>
  .el-tag {
    margin: 7px;
  }

  .bdtop {
    border-top: 1px solid #eee;
  }

  .bdbottom {
    border-bottom: 1px solid #eee;
  }

  .vcenter {
    display: flex;
    align-items: center;
  }
</style>
